Pipe-union.



STATE P f F -Q JOHN '1. KELLY, F BROOKLYN, NEW YORK, ASSIGNOB OF ONE-HALF T0 GEORGE IL I I I JONES, OF PITTSBUBG, PENESYLVANIA.

run-omen.

974,975. I i w s m mm Patented Nov. 8, 1910. p 7 Application and m 1, mos. Serial ms. seam. a To all whom it may concern: iron or steel and having a coating of copper L a full, clear, and exact description t My invention relates to namely couplings,

- means of a coupling ring a by direct bolting together hers secured to the {Be it known that I, JoHN .T. KELLY, a resident of Brooklyn in the county of Kings and State of New hork, have invented a new and useful Im rovement in Pipe-Unions and I do hereby colors the followin to be ereof. ipe unions,

of a metal joint between two couplm mempipes and united by nut or collar, or of such members. Its purpose is to provide a cheap and strong couphng which is non-oxidizab e, and therefore not liable to be fastened together by [rust when in use and at the same time is y adapted to maintain its non-oxidiza'cle sur- 'tostandhig tween the iron member an face under high temperature, such as high steam heat to which lines of this character are subjected; these lines bein often subnoted to. temperatures of severalhundred desee wnere steam under ressure is carried.

0 provide joints adapte to ca steam at such high temperature they have can made either entirel' of brass or like metal adapted heats, or having at least one of its members formed of brass; but theuse of braisiiarts makes the joints ex nsive as comps with such unions ma e of cast iron or steel, while they are by no means as strong as the iron or steel joints, and the are open to the o'ciection that the two d fercnt metals exoand and contract differently under the influence of heat and com, and hence the joints I are liable to open. sliilllgy and cause leakage, for example, lea e between the pi sections and coupling members screwe onto or attached thereto, or in the sealed -'oint formed bethe brass mem The cbjectof my invention is to provide a couplin hard metal and yet to provide a joint which while of great strengt and inex ensive cmanufacture, .is not only not a ected joy rust, but will stand without injury the hig temperatures to which these joints are exposed in connection with the pipe lines for steam and like uses.

It consists, generall stated, in a pipe union having its sever members formed of I electrolytically for fitting plpes by means formed of iron or steel or l1]6 union witn h a parts, a coating of deposited thereon, so formmg a rustless joint between the meeting or sealin faces of theunion and between the coupling member parts as well as with the pipes to which they are connected, which wil resist the action of the steam or like heated fluid.

In the accompanying drawings -is a sectional view of a couplin bodm the invention; and Fig. 2 1s a. ongitu ina section illustratin m invention as applied to what is termela auge union.

The invention is illustrated in Fig. l in connection with a union in part usually termed the tail-piece, such tailpiece having the intern y threaded portion 2 ads ted to screw onto t..e pipe 3 and h ing lie external shoulder 4 engaging with an internal shoulder 5 on the nut or collar 6, the tail-piece also having the inclined or which the two. main members are united by means of armg or collar. In such figure 1- illustrates the Figure 1 beveled male seat 7 forming a metal tight 'oint with the spud 8, the spud having the veled or inclined the external threaded face 10 engaging wit the internal threaded face 11 o t e nut 6 and such spud also having the internal threaded face 12 engaging with the pig: section 13. These parts are of the we 1 or any desired shape and are formed of what mlght be termed cast iron, ing either iron or steel or same. These parts are usually formed of cast iron, or a mixture of cast iron and steel which is subsequently malleableized to give greater strength thereto and somewhat soften the surface of the metal-to provide for the eas cutting of the threads and finishing of t e arts. The parts of the coupling as so ormed are nished in suitable way to rovide the threaded faces for other parts, and the bearin faces or seats 7 and 9 formin the meta, sealing joint properly. or care ully turned and ound to give a perfect bearing surface tween them when the two parts are drawn together, such as by means of the collar 6'. After the finishing of the several copper is electrolyticallz deposited over the entire surface of the di own this term includlike oxidizable v rmetal suitable. ror me manufacture of the ferent coupling members, that is, over the surface of all the members of the union in- 'cluding the bearing faces between the tailpiece and spud the engaging faces of the tailiece and nilt, and the threaded faces of all ta members as well as the parts connect- I ing them. Thisisacoomplished by placing I the coupling members within the electro- .lytic bath and electrolytically depositing on such members a coating of cops-er of suiiicient thickness for the purpose, t e thickness foun of such coatin%being varied by the exposure in the bath. uch coating is illustrated by hes. lines around all the coated parts.

W en the coupling is in use the spud and tail-piece are secure nut or collar, so forming a tight joint be tween such sealing faces; The coatings of copper on the two faces sobrought into contact, rovide a water or steam tight joint d to be very eificientin use and a joint which is rustless, so preventing the sticking of the parts together, no matter how long the joint may remain closed.. In like manif ner the other connections between the parts such as the connections between the spud and tail-piece with the pipe sections, and the threaded connections between the spud and collar, as well as the shoulder connection be tween the tail-piece and collar are also rustseveral parts is adap higher temperature than the highest tern less. The cop r coatin so applied to the P8 tel? to stand a much perature of steam, and such coating is therefore preserved at any heat to which steam or like fluid can be raised. In forming the .sealed joint, it will be seen that the two separate coatin one upon the bearing face or seat 9 of t e spud and the other upon the bearing face or seat? of the tail-piece insure sufficient body of soft metal between the relatively hard faces of the cast. iron parts to insure a perfectly sealed 'oint.

In ccatin-ths parts by electrolytic-deposition a per ect coating is insured, free from any such imperfections as mi ht be present in coating by molten bath, while as the coat:

ing forming the actual joint is deposited upon the bearing surfaces which have been previously turnedand ground, they present practically perfect faces to receive the deposit of the copper, and any possible imperfections thereon are covered by th copr so deposited and a perfectly sealed omt is thus insured, while the thickness 0 the Eogper coating can be regulated. As the erent parts of the joint are made of the same metal, cast iron and steel, the expansion andcont'raction are the same, so that there is no liability of leakage at the oints arising from a difference in expansion and contraction such as where the. parts are formed ofditferent mctals as above referred onto the pipe sections a and the sealin faces or seats 7 and 9 of such- I members are d rawn together by the threaded to. The cast iron or steel is also very much stronger than when its parts are made either wholly or in part of brass, and the cost of the same, as coated with co per, asabove described, is much cheaper than such a joint, as the cost of depositing a coating on the surface of the several cast iron members, is relatively small. If desired, the several parts of the joints especially the spud and tailiece may be malleableized and in doing so he surface of the metal is somewhat softened, so that the sealing faces or seats rafof the couplin member, when coated with copper, yie d ssightly and so aid in forming a more perfect joint.

In Fig. 2 I haveillustrated the invention as applied to what is known as a flanged union. In this case two main members 15 and 16 are empio ed, each member having an internal three ed face 17 to which the pipe sections are connected while one memer 15 has the bearing face or seat 17 and the other member has the bearing face or set-t 18, the two members each having flan cs 19 and 26 beyond their hearing faces and using united by bolts 21 as shown. These two members are formed of cast iron or steel and are finished in the same way, their -rs with co erthe invention can be employed with only one member so coated, sucl.- as the spud, illustrated in Fig; 1.

I am aware that cast iron pipe unions have sen galvanized, a. 6., dipped in a zinc bath. While this might protect pi unions not subjected to heat, the high eat to which those pipe lines are subjected, when carrying steam or other highly heated fluids, acts upon the zinc coating and in a short time destroys the same, by melting, oxidation or otherwise, leaving the cast iron un rotected and liable to rust and corrode wit all the objectionable features of an ordinary cast iron oint. Zinc is alsoa hard metal and is not adapted to form as perfect a joint as the soft copper, while it is exceedingly difiicult 1n coating the pi union with the molten zinc t9 produce t e necessary smooth lfgces for'seahng the joints between the mem- What I claim is:

1. In a pipe union, the combination of members having bearing faces adapted to 130 be drawn into sealing contact, said members copper. deposited over the entire surface [j bein formed of'cast imp, and one cf 'smd thereof. 4 10 mem ex's having a cont-mg of cogper de- In testlmony whereof, I, the said JOHN T. posited on the hearing face thereo (BLLY, have hereunto set m hand. a 2. In, a plpe union, the combination of JOH T. KELLY. members havmg faces adzl ted to be drawn Witnesses: f into sealing contact, said members bein J N0. J. McGEn,

formed of cast iron'and having a coating 0 S. MATI'IMORE. 

